gah, mistweaked bug 284086

browser/components/nsBrowserGlue.js

@@ -199,7 +199,7 @@ var Module = {
     const catman = Components.classes['@mozilla.org/categorymanager;1']
                              .getService(Components.interfaces.nsICategoryManager);
     var len = kServiceCats.length;
-    for (var j = 0, j < len; j++) {
+    for (var j = 0; j < len; j++) {
       catman.deleteCategoryEntry(kServiceCats[j], kServiceCtrId, true);
     }
   },